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laboratory investigations into the spectra and origin of propylene oxide: a chiral interstellar moleculePropylene oxide was recently identified in the interstellar medium, but few laboratory results are available for this molecule to guide current and future investigations. To address this situation, here we report infrared spectra, absorption coefficients, and band strengths of solid propylene oxide along with the first measurement of its refractive index and a calculation of its density, all for the amorphous solid form of the compound. We present the first experimental results showing a low-temperature formation pathway for propylene oxide near 10 K in interstellar ice analogs. Connections are drawn between our new results and the interstellar molecules propanal and acetone, and predictions are made about several as yet unobserved vinyl alcohols and methylketene. Comparisons are given to earlier laboratory work and a few applications to interstellar and solar system astrochemistry are described.
Document ID
Document Type
Reprint (Version printed in journal)
Hudson, R. L.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Loeffler, M. J.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Yocum, K. M.
(Kutztown State Coll. PA, United States)
Date Acquired
April 7, 2017
Publication Date
January 31, 2017
Publication Information
Publication: The Astrophysical Journal
Volume: 835
Issue: 2
ISSN: 0004-637X
Subject Category
Chemistry and Materials (General)
Space Sciences (General)
Report/Patent Number
Distribution Limits
molecular processes